Air India B787 crash Ahmedabad

So the FDR might have been getting different information to the FADEC then.

The fuel cut off switches directly operate a relay which operates the valve which control fuel flow to the engine called a Spar valve without ever going via FADEC.

While FADEC can control the Spar valve (I think) , the important point to note is that the prelim report data came from the EAFR (787 combined FDR+CVR) which indicated the Fuel cut off switches were operated. Operation of The fuel cut of switches is directly recorded by EAFR and does not involve FADEC so any "FADEC glitch" could not have caused the recording of fuel cut off switch condition to OFF by the EAFR.
 
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The fuel cut off switches directly operate a relay which operates the valve which control fuel flow to the engine called a Spar valve without ever going via FADEC.

While FADEC can control the Spar valve (I think) , the important point to note is that the prelim report data came from the EAFR (787 combined FDR+CVR) which indicated the Fuel cut off switches were operated. Operation of The fuel cut of switches is directly recorded by EAFR and does not involve FADEC so any "FADEC glitch" could not have caused the recording of fuel cut off switch condition to OFF by the EAFR.
So a human hand switched them to "OFF" in the coughpit?
 
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Have people seen this and have any comment?:


I know it's derived from the Geoffrey Thomas site. Nevertheless, it seems to be an extremely precise analysis so could such an alignment of highly unlikely events be a plausible explanation?
 
Had a vague recollection ? the taxiing activity was longer than normal due to a closed taxiway so there was a whole run sprint of much extra distance IMG_8985.png
From further vague recollection the weather had been rainy (water ingress was mentioned as well)

With situations of risk
Often there is a
Low likelihood AND High impact

just because the likelihood is Low doesn’t mean it can’t or won’t happen and when it does - well we saw the impact
 
I defer to far greater knowledge than mine about this tragic event and disquiet about YouTubers and their motives but wanted to point out that the very detailed Geoffrey Thomas YouTube analyses are proposing that the cause is not pilot action.
 
I defer to far greater knowledge than mine about this tragic event and disquiet about YouTubers and their motives but wanted to point out that the very detailed Geoffrey Thomas YouTube analyses are proposing that the cause is not pilot action.
I don’t understand ‘why’?

Why are these two people coming forward with this hypothesis? What’s the motive?

They state things as fact, yet they say those facts cannot be substantiated until we see things such as maintenance logs. Which may not be available until the authorised accident report comes out.

Sure, if the official report had come out and it looks like a cover up, there may be a place for further inquiry.

But we are a long way from that now.

If they are wanting regulators to mandate urgent checks of systems, they should come right out and say that at the beginning of their videos.
 
I consider both of these people extremely unreliable. GT hangs around the periphery of aviation like a bad smell. He is not an expert. The other bloke is behind a supposed method of tracking the missing Malaysian flight. The veracity of that method, and of the experiments behind it, is the subject of doubt.

Having said that though, I would prefer the outcome to be a Boeing or engineering screw up, as I find the intentional murder of a pilot's passengers to be disgusting (for lack of a stronger term).
 
I consider both of these people extremely unreliable. GT hangs around the periphery of aviation like a bad smell. He is not an expert.
Hadn't heard of this guy before. Googled him. His Linkedin profile says that he's an aviation journo. Hmmm.

I wonder if he coined the dreaded "plunge" term when describing turbulance.
 
So
  • people rightfully question credentials, motivations and approach of these people.
  • some of these journalists and other 'analysts' question the validity of the interim report and that it appears to erroneously shift blame to the pilots.
If there is something 'odd' going on, it is the role of journalists to try to uncover the truth. People say everything should wait until the final report, but I doubt family members would be sanguine about what has been released to date.
 
So
  • people rightfully question credentials, motivations and approach of these people.
  • some of these journalists and other 'analysts' question the validity of the interim report and that it appears to erroneously shift blame to the pilots.
If there is something 'odd' going on, it is the role of journalists to try to uncover the truth. People say everything should wait until the final report, but I doubt family members would be sanguine about what has been released to date.
I didn’t have the same reading on the interim report.

I did not see blame shifted to the pilots. Accident reports don’t typically assign ‘blame’, they state the facts. It is then for the courts to assign blame based on legal principles. India has an excellent legal system with many distinguished members of the judiciary.

The interim report is here: https://aaib.gov.in/Reports/2025/Accident/Preliminary Report VT-ANB.pdf, and details of the cut off and pilot communication on the issue is on page 14.

There is no apportioning of blame, only a factual account of one pilot asking the other ‘why he did that’.

Agree investigative journalism is very important when it comes to accountability. But without the facts, how can you investigate? You can’t.

These vlogs are just speculation. They may turn out to be right, but then what? They want some sort of recognition? To do what? Drive further commercial interests? Or are they interested in safety? If it is safety, why isnt the first thing on every vlog a demand for boeing, government and regulators to mandate relevant maintenance checks?

Family members have challenged accident reports after they have been finalised, as we saw for the United 747 cargo doors. That’s the time for investigative journalism.
 
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I don’t think many would be surprised by this. We haven’t seen great transparency in many accidents in recent times, the 737 that went down in China, the 737 in Korea, and I wouldn’t expect too many details forthcoming with the 747 that went off the runway in Hong Kong.

How any court can rule out the Captain being responsible is beyond me.

It’s clear which way India wants this to go, and the US has other ideas. Will be interesting to see if the US or perhaps others in the Trump Administration get vocal if India go down the mechanical/Boeing blame path.

US fears cover-up in Air India crash​

Joint investigation between two countries marred by mutual suspicion between officials


Benedict Smith
28 November 2025 9:49pm GMT
US officials fear Indian authorities are trying to cover up the deadly Air India plane crash, which killed 260 people.
Just one passenger survived when Flight 171 crashed seconds after taking off from Ahmedabad in western India in June, killing 241 travellers and crew, along with 19 people on the ground.
US investigators believe the evidence points to Sumeet Sabharwal, the flight’s captain, deliberately crashing the plane, The Wall Street Journal reported.
Data downloaded from the Boeing Dreamliner’s black box allegedly shows someone inside the coughpit moved the switches to cut off the engine’s fuel supply.

The captain did not then attempt to raise the nose of the aircraft before the crash, the evidence reportedly shows.
Some US officials fear the Indian government will seek to obstruct the findings and instead blame mechanical faults with the plane.

The plane crashed 11 seconds after taking off from Ahmedabad airport on June 12 Credit: Vijay Patani/AFP

However, Indian observers believe the US is overlooking flaws in American-made planes, although no Boeing Dreamliner has ever suffered a fatal crash before.
India’s top court this month said Sabharwal was not to blame for the disaster.
Sabharwal’s father has said his son has been the target of a “character assassination” despite his “unblemished 30-year career” as a pilot.

People gathered near a memorial banner to pay tribute to the flight’s captain, Sumeet Sabharwal Credit: Divyakant Solanki/EPA-EFE/Shutterstock
The joint investigation between India and the US, which is involved because the Boeing was manufactured in the US and approved by American safety regulators, has been marred by mutual suspicion between officials.
GVG Yugandhar, who leads India’s aircraft accident investigation bureau, is said to have told US officials they were “not a third world country” and “can do anything you all can do”.

Indian authorities are accused of failing to prioritise gathering and analysing data from the black box, although this has been disputed by a figure familiar with India’s investigation process.
American investigators were banned from taking photos of the wreckage, some of which was moved before they could examine it, sources said.
Two American black-box specialists who landed in New Delhi in June were warned not to accompany Indian authorities to a remote laboratory to analyse flight data and voice recorders from the coughpit.

Flight recorders retrieved from the wreckage Credit: Amit Kumar
Jennifer Homendy, the chairman of the US National Transportation Safety Board (NTSB), is said to have been worried about the safety of US personnel and equipment given the risk of terrorism or military conflict in the region.
Indian officials had pushed to analyse the black box in the small town of Korwa, which they deemed better equipped and located away from media attention.
Ms Homendy argued that authorities should download data from either their laboratory in New Delhi or work in the NTSB’s Washington facilities.
In the end, Indian authorities agreed to analyse the data from the New Delhi site after the US threatened to pull their support from the investigation.

Ms Homendy’s calls to her counterpart, Mr Yugandhar, for updates are said to have gone unanswered.
 
Whilst I think it’s pretty obvious which way the wind is blowing here…. it’s worth noting that the recorders do not record the fuel cutoff switches being moved. They record a signal that they identify as having come from those switches. Just slightly different.
 
Whilst I think it’s pretty obvious which way the wind is blowing here…. it’s worth noting that the recorders do not record the fuel cutoff switches being moved. They record a signal that they identify as having come from those switches. Just slightly different.
If the switches had been moved would they have sent a different signal that definitively indicates that they had been moved?
 
I didn’t have the same reading on the interim report.

I did not see blame shifted to the pilots. Accident reports don’t typically assign ‘blame’, they state the facts. It is then for the courts to assign blame based on legal principles. India has an excellent legal system with many distinguished members of the judiciary.

The interim report is here: https://aaib.gov.in/Reports/2025/Accident/Preliminary Report VT-ANB.pdf, and details of the cut off and pilot communication on the issue is on page 14.

There is no apportioning of blame, only a factual account of one pilot asking the other ‘why he did that’.

Agree investigative journalism is very important when it comes to accountability. But without the facts, how can you investigate? You can’t.

These vlogs are just speculation. They may turn out to be right, but then what? They want some sort of recognition? To do what? Drive further commercial interests? Or are they interested in safety? If it is safety, why isnt the first thing on every vlog a demand for boeing, government and regulators to mandate relevant maintenance checks?

Family members have challenged accident reports after they have been finalised, as we saw for the United 747 cargo doors. That’s the time for investigative journalism.
That is true. It is also true that there are very very substantial commercial and national interests at play. Over the past few years I’ve lost a lot of trust in institutions and some countries actually trying to determine the truth versus spinning their version of the truth.
 

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